One that office bungled, seemingly (2,3,4,2,2)
I believe the answer is:
on the face of it
'seemingly' is the definition.
('on the face of it' can be a synonym of 'seemingly')
'one that office bungled' is the wordplay.
'bungled' indicates anagramming the letters.
'one'+'that'+'office'='onethatoffice'
'onethatoffice' with letters rearranged gives 'ON THE FACE OF IT'.
(Other definitions for on the face of it that I've seen before include "Apparently (2,3,4,2,2)" , "as it would appear" , "From appearances alone" , "some of those climbing the Eiger may be seen here" , "Where you can see clock's hands" .)